Add inverting section to README.md
Fix cuc-invertColor method to maintain alpha from instance
Add UIColor+Mixing and write a class method to return the result of mixing an array of colors
Fix file path for info.plist and prefix.pch files in the .xcodeproj project settings
Add testing methods for the Hex, Incrementing, Inverting and Mixing categories to CUCViewController.h
Fix -cuc_colorWithChangesToHue:saturation:brightness:alpha to treat grayscale UIColor instances as white
Fix cuc_colorWithChangesToHue:saturation:brightness:alpha to work as expected with grayscale UIColor instances.
Update README.md to include explanation of cuc_colorWithChangesToHue:saturation:brightness:alpha treatment of grayscale UIColor instances
Add MIT license comment to category files
Fix cuc_colorFromMixOfColors: to be additive of multiple colors, rather than averaging.
Add README.md section on the Mixing category